1220221222 has 8 divisors (see below), whose sum is σ = 1996725672. Its totient is φ = 554646000.

The previous prime is 1220221217. The next prime is 1220221241. The reversal of 1220221222 is 2221220221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 1220221196 and 1220221205.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27732279 + ... + 27732322.

It is an arithmetic number, because the mean of its divisors is an integer number (249590709).

Almost surely, 2^1220221222 is an apocalyptic number.

1220221222 is a deficient number, since it is larger than the sum of its proper divisors (776504450).

1220221222 is a wasteful number, since it uses less digits than its factorization.

1220221222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55464614.

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 1220221222 is about 34931.6650333190. The cubic root of 1220221222 is about 1068.5943115690.

Adding to 1220221222 its reverse (2221220221), we get a palindrome (3441441443).

The spelling of 1220221222 in words is "one billion, two hundred twenty million, two hundred twenty-one thousand, two hundred twenty-two".